00253nam a2200109Ia 4500008004100000041000800041082001200049100001400061245002600075260003300101300000900134220803s9999    xx            000 0 und d  aeng  a6.6 STE  aStephen J  aCAD Design Studio 3D.  aNew DelhibMcgraw Hillc1991  a120p